For instance, in the case that the other system information is not urgently demanded, there may exist a notification period of broadcasted other SI. Such a notification period can be pre-defined or indicated, and may be changed, in the MIB. Then, the transmission time can indicate after which amount of notification period, the SI will start to be transmitted. The start of transmission of the SI may also be indicated in other forms, as will become apparent from the following description.

Currently, there is no definition on how to transmit minimum SI in NR. For instance, as also discussed above, in LTE there is a MIB which will be transmitted in broadcast channel PBCH (physical broadcast channel) and SIBx which is be transmitted in a shared channel PDSCH (physical downlink shared channel).

For NR, there may be a separated transmission of minimum SI on broadcast channel and shared channel, then the following embodiments for transmitting the scheduling information may be supported.

As also illustrated in FIG. 2, in an embodiment, the scheduling information of on-demand SI will be included in the MIB-like system information, which is transmitted at 10 by the LTE eNodeB 3 and at 11 by the NR eNodeB 5 and is received by the UE accordingly.

In this embodiment, for every possible SIBs which will be allowed to be transmitted in an on-demand manner, a scheduling list is provided for each of them (SIBs) and their corresponding scheduling information is also provided, even though some bits of the SIBs will not be scheduled to be broadcasted. Further optimizations can be considered to minimize the message size. In some embodiments, it is the fasted way to get the corresponding scheduling information at the cost of increased MIB-like size.